Heat


1. Between which two points does water gain the most energy?



A and B
C and D
D and E
E and F

2. Which characteristics of a material have the greatest effect on the amount of insolation that the material will absorb

Density and hardness.
Hardness and age.
Age and roughness.
Roughness and color.

3. During which process of energy exchange does cold air displace warmer air?

Absorbtion.
Convection.
Conduction.
Radiation.

4. By which process does starlight travel through space?

Absorbtion.
Convection.
Conduction.
Radiation.

5. The temperature of an object is determined by the

Average kinetic energy of its molecules.
Average potential energy of its molecules.
Total kinetic energy of the object.
Total potential energy of the object.

6. The amount of heat energy needed to change the temperature of 1 gram of water by 1°C is

2.11 Joules
4.18 Joules
334 Joules
2260 Joules

7. When electromagnetic energy strikes an object that is a good radiator of electromagnetic energy, most of the energy will be

Reflected.
Refracted.
Scattered.
Absorbed.

8. By what process is energy transferred from the light bulb to the cups?



Convection
Conduction
Radiation

9. Whch cup will gain heat at the fastest rate?



The black cup will gain heat faster
The shiny cup will gain heat faster
Both cups will hain heat at an equal rate

10. After several minutes the light bulb is turned off. Which cup will return to room temperature (cool) fastest?



The black cup will cool fastest.
The shiny cup will cool fastest.
Both cups will cool at the same rate.

11. By what process is heat transferred through the iron bar shown in the diagram?



Conduction
Convection
Radiation

12. Which of the following phrases is most closely associated with heat transfer by convection?

Collision of molecules
Electromagnetic waves
Heat transfer through the vacuum of space
Density differences

13. Between which 2 points is water evaporating?



B and C
C and D
D and E
E and F

14. At which point in the diagram does H2O have the highest specific heat?



Point A
Point C
Point E
Point F

15. Which example of heat energy transfer is due mainly to convection?

Heated air moving from the Earth's surface to the upper atmosphere.
Energy being reflected from a lake surface to the air above.
Heat energy transferred through a solid metal door.
Heat energy transferred from the Sun to the Earth.

16. Which statement is the best example of heat energy transfer by conduction?

Heat energy transferred from the bottom to the top of a lake.
Heat energy transferred from the surface soil to the rocks below.
Heat energy transferred from the surface to the upper atmosphere.
Heat energy transferred from the Sun to the Earth.

17. At which temperature will an object radiate the greatest amount of electromagnetic energy?

0 degrees Fahrenheit
5 degrees Celcius
10 degrees Fahrenheit
230 degrees Kelvin

18. Between the years 1850 and 1900, records indicate that the Earth's mean surface temperature showed little variation. This would support the inference that

The Earth was in radiative balance.
Another ice age was approaching.
More energy was coming in than was going out from the Earth
There was an increase in the amount of energy radiated by the Sun.

19. What happens to radiant energy that strikes the Earth's crust?

It is completely absorbed.
It is completely reflected.
It is partially absorbed and partially reflected.
It is changed from long wavelengths to short wavelengths.

20. As the Earth's surface absorbs solar energy and then radiates it, the wavelength of the outgoing energy will have

Increased
Decreased
Remained the same

21. Which diagram correctly shows the convection of air around a campfire?



1
2
3
4

22. If they are all at the same temperature, from which container will water evaporate at the fastest rate?



1
2
3
4

23. All samples have the same mass and are at the same temperature. If equal amounts of heat energy are added to the samples, which will experience the greatest change in temperature?



Water
Basalt
Granite
Copper

24. An object was added to a beaker of water. Using a thermometer, a student observed an immediate increase in water temperature. What is the best interpretation of this observation.

The object was an energy source to the water and to the thermometer.
The object was an energy sink to the water but a source to the thermometer.
The object and the thermometer were energy sinks to the water.
The thermometer was an energy sink to the water but a source to the object.

25. All four samples shown in the diagram are placed in a cool (0°C) environment. Which material will take the greatest amount of time to reach 0°C?



Water
Basalt
Granite
Copper

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